systemversions.py
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systemversions.py
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	# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io>
	#
	# This library is free software; you can redistribute it and/or
	# modify it under the terms of the GNU Lesser General Public
	# License as published by the Free Software Foundation; either
	# version 2.1 of the License, or (at your option) any later version.
	#
	# This library is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	# Lesser General Public License for more details.
	#
	# You should have received a copy of the GNU Lesser General Public License
	# along with this library. If not, see <http://www.gnu.org/licenses/>.

	import os
	import re
	import sys
	import vyos.defaults

	def get_system_versions():
	"""
	Get component versions from running system; critical failure if
	unable to read migration directory.
	"""
	system_versions = {}

	try:
	version_info = os.listdir(vyos.defaults.directories['current'])
	except OSError as err:
	print("OS error: {}".format(err))
	sys.exit(1)

	for info in version_info:
	if re.match(r'[\w,-]+@\d+', info):
	pair = info.split('@')
	system_versions[pair[0]] = int(pair[1])

	return system_versions